Holt, H. (1867) “Observations upon a ’Shilling’ of Francis the Dauphin and Mary Stuart, representing them as ’King and Queen of Scotland, England, and Ireland,’ dated 1558, with Notes regarding the Assumption by Queen Mary of the Arms and Crown of England”, Proceedings of the Society of Antiquaries of Scotland, 7, pp. 279–287. doi: 10.9750/PSAS.007.279.287.